Answer:
yes to all 3
Explanation:
A
3z = 21 ( isolate z by dividing both sides by 3 )
z = 7
B
n + 14 = 36 ( subtract 14 from both sides )
n = 22
C
v = 12 ( multiply both sides by 4 to clear the fraction )
3v = 48 ( divide both sides by 3 )
v = 16
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v = 12 ( multiply both sides by 4 to clear the fraction )